I am about to select a hall effect sensor. Two types are available: one has an open collector (OC) output, the other an RC output. The datasheet states that both are current sinking. But because I neither know what the RC output is (at least I am not sure) nor how it works, I am not able to select one.
My question is about the RC output. Does RC stand for resistor / capacitor to create the output signal? If so, how does it work? My guess would be, that the resistance or capacitance are modified to create a varying output signal.
Because I have to choose between the OC / RC output type I would like to know the advantages of the RC output type. The datasheet only mentions:
If there is stronger electromagetic interference or the distance between sensor and the measuring
instrument is farther, an OC output (open collector) is suggested to use.
Why should I choose the RC output type?
Best Answer
You want the OC version,
It appears that "RC" simply means that it is the same as the open collector version BUT there is an internal pullup (NPN) or pulldown (PNP) resistor included inside the package.
The CYGTS101RC sensor also made by Chen Yang has RC output BUT has the decency to say in its data sheet:
and
And they are even kind enough to provide this diagram: